macOS broken in current brew installation

[dvarrazzo]

Installing postgres on macOS doesn't install a working libpq.

• first broken workflow: https://github.com/psycopg/psycopg/actions/runs/2970465835
• tests workflows: https://github.com/psycopg/psycopg/actions/workflows/tests.yml?query=branch%3Amacos-broken

asking upstream for info.

[dvarrazzo]

Upstream discussion: https://github.com/orgs/Homebrew/discussions/3595

[dvarrazzo]

Releasing a workaround for this problem in psycopg 3.1.1 and 3.0.18, but I expect it to be fixed upstream.